.header{
	width:100%;
	height:112px;
	filter:alpha(opacity=100 finishopacity=50 style=1 startx=0,starty=0,finishx=0,finishy=150) progid:DXImageTransform.Microsoft.gradient(startcolorstr=#cfcfcf,endcolorstr=#f5f5f5,gradientType=0);
    -ms-filter:alpha(opacity=100 finishopacity=50 style=1 startx=0,starty=0,finishx=0,finishy=150) progid:DXImageTransform.Microsoft.gradient(startcolorstr=#cfcfcf,endcolorstr=#f5f5f5,gradientType=0);/*IE8*/	
    background:url(../images/header_bg.png) repeat-x; /* 一些不支持背景渐变的浏览器 */  
    background:-moz-linear-gradient(top, #cfcfcf, #f5f5f5);  
    background:-webkit-gradient(linear, 0 0, 0 bottom, from(#cfcfcf), to(#f5f5f5));  
    background:-o-linear-gradient(top, #cfcfcf, #f5f5f5); 
    .logo{
    	float:left;
    	margin-top:20px;
    	font-size:0;
    	img{
    		width:100%;
    		height:auto;
    	}
    }
    .nav{
    	margin-left:205px;
    	li{
    		float:left;
    		a{
    			display:block;
    			width:142px;
    			height:112px;
    			text-align:center;
    			text-decoration:none;
    			color:#363636;
    			font:18px/112px "Microsoft YaHei","Helvetica Neue";
    		}
    	}
    	.active{
    		background-color:#454545;
    		a{
    			color:#fff;
    		}
    	}
    }
}
.headerActive{
    position:fixed;
    top:0;
    left:0;
    z-index:2;
    width:100%;
    height:66px;
    .logo{
        float:left;
        margin-top:5px;
        font-size:0;
        img{
            width:100%;
            height:auto;
        }
    }
    .nav{
        margin-left:205px;
        li{
            float:left;
            a{
                display:block;
                width:142px;
                height:66px;
                text-align:center;
                text-decoration:none;
                color:#363636;
                font:18px/66px "Microsoft YaHei","Helvetica Neue";
            }
        }
    }
}
